Microwave Dielectric Properties of sintered TiO2 and ZnO Nanowires Prepared from Chemical Solution Methods

• Main Authors: Min-ming Lin, 林明��
• Other Authors: Chuan-feng Shih
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/63183851731270006156

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 97 === In this paper, The ZnO and TiO2 nanowires were synthesized separately using hydrothermal method. A calcination-free solid-state sintering process was using ZnO and TiO2 nanowires as starting materials to synthetic Zn2TiO4,and added a trace of TiO2 nanowires for synthesis of solid-state sintering method. Hydrothermal synthesis of the ZnO and TiO2 nanowires study, by controlling the reaction time, solution pH, reaction temperature,concentration and other parameters, synthesis of high surface area titanium dioxide and zinc oxide nanowire. They have high purity, good uniformity, excellent reproducibility, etc., without expensive equipment can be mass produced nano-powder at low temperature. The ZnO and TiO2 nanowires by calcination-free solid-state sintering process synthesis Zn2TiO4, in less than a thousand degrees can be successfully sintered.Zn2TiO4 ceramic microwave dielectric properties: k = 24, τf = -25 ppm/oC. Add 2 ~ 12 wt% Titanium dioxide to synthesis Zn2TiO4 of solid-state sintering method. By the experimental results showed that,Zn2TiO4 at the sintering temperature 970oC, add x = 8 wt%, The microwave dielectric constant (k) for 24, Q x f for 37000. Sintering temperature at 970 oC, add the amount of x = 12 wt. % of TiO2 nanowires,the resonance frequency of temperature coefficient τf = 0 ppm/oC.Zn2TiO4 system, add xTiO2 (x = 2 ~ 12 wt %), at a low sintering temperature, it has a high Q x f value, high-k and τf = 0 ppm/oC.